* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.nav {
  width: 100%;
  height: 80%;
  background-color: red;
}
.nav1 {
  display: flex;
  justify-content: space-between;
  width: 80%;
  height: 80px;
  margin: 0 auto;
}
li {
  list-style: none;
}
.nav1 > li {
  position: relative;
  display: flex;
  align-items: center;
  width: 10%;
  height: 80px;
  list-style: none;
}
/* .nav1 > li :hover{
  background: url("https://www.hongyan.info/Public/style/lihong/images/public/nav.png") no-repeat left top;
} */
.nav1 > li :hover{
  background-color: rgb(159, 11, 11);
}
.nav1 li :hover span{
  color: #fff;
}
.nav1 > li:hover .nav2 {
  display: block;
}
.nav1 > li > a {
  text-decoration: none;
  display: flex;
  width: 100%;
  height: 100%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 24px;
  font-family: "黑体";
  font-weight: 700;
}
.nav1 > li a span {
  font-size: 13px;
  letter-spacing: 2px;
}
.nav2 {
  width: 100%;
  background-color: rgb(159, 11, 11);
  position: absolute;
  top: 80px;
  left: 0;
  z-index: 1000;
  display: none;
}
.nav2>li {
  width: 100%;
  line-height: 32px;
}
.nav2 li,a {
  display: block;
  text-align: center;
  font-size: 20px;
  font-family: "黑体";
}
.nav2>li a:hover {
  background-color: red;
}